A grain silo / ventilation tube in the Djoser complex.
Retrieving grain was much easier with an open stairwell.
A second generation grain silo in the Djoser complex.
A crane for lifting out baskets of grain and lowering items into the tunnels.
A ventilation shaft connected to the grain silo tunnels. Grain could also have been pulled up in baskets.
An open stair well used to retrieve grain from the second generation silos of the Djoser Complex.
An open stairwell for retrieving grain from the silos.
Stairwell down to the tunnel for retrieving grain from the silos The shape of the stairwell would have directed wind into the tunnels.
The new generation of grain silos had an open stairwell providing better ventilation of the underground tunnels.